Solutions & Concentrations

  • Dilution Factor from Volumes Calculator
    Calculate the dilution factor from sample and diluent volumes. DF = (V_sample + V_diluent) / V_sample. Free, instant lab dilution tool.
  • Mass of Solute from Molarity and Volume Calculator
    Calculate the mass of solute needed for a solution from its molarity, volume, and molar mass using m = M x V x MW. Fast and accurate for chemistry.
  • mmol/L to mg/dL Calculator
    Convert mmol/L to mg/dL for glucose, cholesterol, creatinine, urea and more. Uses mg/dL = (mmol/L × MW) / 10 with selectable molecular weights.
  • mg/dL to mmol/L Calculator
    Convert mg/dL to mmol/L for glucose, cholesterol, triglycerides or any substance using its molecular weight. Fast, accurate clinical unit converter.
  • IV Drip Rate Calculator (gtt/min)
    Calculate IV drip rate in drops per minute (gtt/min) from volume, infusion time, and drop factor. Free, fast nursing flow-rate tool.
  • Fertilizer PPM Calculator
    Convert grams of fertilizer per gallon or liter into N-P-K ppm. Enter weight, nutrient percentage, and water volume to get parts-per-million instantly.
  • EC to TDS (ppm) Calculator
    Convert electrical conductivity (EC in µS/cm or mS/cm) to TDS in ppm using a 0.5, 0.64, or 0.7 conversion factor. Free, instant water quality tool.
  • OD600 to Cell Density Calculator
    Convert OD600 optical density to cell density (cells/mL) using a conversion factor. Estimate bacterial cell counts for E. coli and other cultures.
  • IV Infusion Rate Calculator
    Calculate IV infusion rate in mL/hr from total volume and time. Also computes drip rate (gtt/min) using a drop factor. Fast, free pump-rate tool.
  • Dose to Volume Calculator
    Convert an ordered medication dose into the volume to administer using stock concentration. Volume = Dose / Concentration. Fast, free dosage tool.
  • Fold Dilution Calculator
    Calculate the fold dilution (X-fold) from sample and final volumes. Get the dilution factor and the diluent volume to add for any lab dilution.
  • Concentration from Moles and Volume Calculator
    Calculate molar concentration (molarity, mol/L) from the amount of solute in moles and the solution volume in liters or milliliters. Free and instant.
  • mg/kg Dosage Calculator
    Calculate a weight-based medication dose in mg using the mg/kg formula. Enter dose per kg and body weight (kg or lb) for instant results.
  • Pool Chlorine Dosage Calculator
    Calculate how much chlorine to add to your pool to reach a target free chlorine ppm. Enter volume, current and target ppm, and product strength.
  • Moles to Grams Calculator
    Convert moles to grams instantly. Enter the amount in moles and the molar mass (g/mol) to find mass using mass = moles × molar mass.
  • Mass Needed for Molarity Calculator
    Calculate the mass of solute in grams needed to prepare a solution of a given molarity and volume. Enter molarity, volume, and molar mass.
  • Ka and pKa Calculator
    Convert between Ka and pKa instantly. Enter an acid dissociation constant to get pKa, or a pKa to get Ka using pKa = -log10(Ka).
  • PPM to Percent Calculator
    Convert parts per million (ppm) to percent instantly. Enter any ppm value and get the equivalent % using percent = ppm ÷ 10,000.
  • Percent to PPM Calculator
    Convert a percent concentration to parts per million (ppm) instantly. Enter a percentage and get the ppm value using ppm = percent × 10,000.
  • Molarity to Molality Calculator
    Convert molarity (mol/L) to molality (mol/kg) using solution density and solute molar mass. Free online chemistry conversion calculator with formula.
  • g/L to Molarity Calculator
    Convert grams per liter (g/L) to molarity (mol/L) instantly. Enter concentration and molar mass to get molar and millimolar values.
  • Molarity to PPM Calculator
    Convert molarity (mol/L) to parts per million (ppm) instantly. Enter molarity and molar mass to get ppm for dilute aqueous solutions.
  • Grams to Milliliters Calculator
    Convert grams to milliliters using density. Enter mass in grams and density in g/mL to get the volume instantly with the formula V = m / ρ.
  • Mass Percent Composition Calculator
    Calculate the mass percent composition of an element in a compound. Enter the element mass and total compound mass to get the percentage by mass instantly.

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